25250163100 has 144 divisors (see below), whose sum is σ = 56970478656. Its totient is φ = 9709056000.

The previous prime is 25250163077. The next prime is 25250163151. The reversal of 25250163100 is 136105252.

It is a super-2 number, since 2×25250163100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74926132 + ... + 74926468.

It is an arithmetic number, because the mean of its divisors is an integer number (395628324).

Almost surely, 2^25250163100 is an apocalyptic number.

25250163100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25250163100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28485239328).

25250163100 is an abundant number, since it is smaller than the sum of its proper divisors (31720315556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25250163100 is a wasteful number, since it uses less digits than its factorization.

25250163100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 25250163100 its reverse (136105252), we get a palindrome (25386268352).

The spelling of 25250163100 in words is "twenty-five billion, two hundred fifty million, one hundred sixty-three thousand, one hundred".